Compatibility of disc brakes

Fixing the brake caliper to frame and forks

IS2000

On this older standard the fixing bolts for the brake caliper are at right angles to the direction of travel. Bild 1Bild 2 The distance between the fixing bolt holes for the brake caliper is 51 mm.

Postmount

On this standard the fixing bolts for the brake caliper are parallel to the direction of travel. Bild 3Bild 4 On Postmount the distance between the fixing bolt holes for the brake caliper is 74 mm.

Fixing the brake disc to the hub

Six-hole fixing

This standard is used by the majority of manufacturers. The brake disc is fixed to the hub body by six bolts.

Centerlock

This standard is used by Avid and Shimano. The brake disc is fixed at its centre to the hub. The brake disc is pushed onto a cog and then tightened up using a lock ring. By using an adapter you can use Centerlock hubs with six-hole fixing.

Conventional brake disc sizes

American sizes:

6“ (160mm), 7“ (185mm) 8“ (203mm)
Normally used by Avid.

European sizes:

160mm, 180mm, 203mm
Normally used by Formula, Magura and Shimano

You can use larger brake discs with both American and European sizes if you fit an appropriate adapter. If you opt to use an adapter, one speaks of the so-called Postmount. If the caliper is fitted without an adapter, one speaks of the so-called Direct Mount.

FOX forks with 32mm stanchions:

FOX forks with 36mm stanchions:

FOX40:

Marzocchi 66 RCV:

Magura all forks:

upto 210mm, Durin have 6“ Postmount

Rock Shox Totem:

upto 210mm, 8” Postmount

Revelation, Reba, Recon, Tora:

upto 210mm, 6” Postmount

Dart:

upto 160mm, 6“ Postmount

SID World Cup:

upto 185mm, IS2000

These values are recommended if not other values are given either in the manuals of the manufacturers or printet on the bicycle part. Always mind the instructions of the manufacturers for dismantling and detaching of brakes. Ensure that all screws and bolts are tightened to the correct torque. The correct torque is indicated on the component itself, in the bike manual provided with your new bike, or here in the Technical Support Center.